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IB Chemistry SL 1.3.3 Main energy levels

IB Chemistry SL 1.3.3 Main energy levels
IB Chemistry syllabusFirst assessment 2025

Practise determining the maximum number of electrons that can occupy a given main energy level, especially for the third and fourth shells in atoms.

How this is tested

  • calculate the maximum electrons that can occupy the n=3 main energy level
  • identify the electron capacity of the fourth main energy level or shell
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